code: def test_unstack(
      *,
      x_n_dtype_axis,
      keepdims,
      test_flags,
      backend_fw,
      fn_name,
      on_device,
  ):
      # smoke test
      dtype, x, axis = x_n_dtype_axis
      if axis >= len(x[0].shape):
          axis = len(x[0].shape) - 1
      helpers.test_function(
          input_dtypes=dtype,
          test_flags=test_flags,
          backend_to_test=backend_fw,
          fn_name=fn_name,
          on_device=on_device,
          x=x[0],
          axis=axis,
          keepdims=keepdims,
      )
  
imports: import numpy
  from hypothesis import strategies, assume
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_test
label_desc: Use image node_id 24 for calling a global function with example usage: test_unstack() without return types